7 results about "Halothane" patented technology

The invention relates to the technical field of medical equipment, in particular to a self-adaptive Alzheimer's disease anesthetic gas flow limiting device which is applied to the biomedical engineering industry and comprises a machine body, a display screen, a multi-parameter detector, a detection probe, a gas output device, a gas output pipe, a reversing valve and a corrugated pipe. The reversing valve comprises a reversing valve body and further comprises a flow descending mechanism, a reversing mechanism, a linkage mechanism, a driving mechanism and a limiting mechanism, the flow descending mechanism is arranged in the reversing valve body, the reversing mechanism is installed in the reversing valve body and connected with the flow descending mechanism, the linkage mechanism is connected with the reversing mechanism, and the driving mechanism is connected with the linkage mechanism. The limiting mechanism is connected with the driving mechanism, when anesthetic gas flows through the flow lowering mechanism in the reversing valve, the driving mechanism is pressed to drive the linkage mechanism to rotate, the linkage mechanism drives the reversing mechanism to rotate synchronously, and the reversing mechanism swings to change the flow direction of the anesthetic gas in the flow lowering mechanism. The output concentration of sevoflurane is adjusted according to the volatilization conditions of sevoflurane at different temperatures, and the situation that under the condition that volatilization of sevoflurane is intensified at high temperature, the output gas concentration is too high, and consequently a patient suffering from the Alzheimer's disease inhales excessive sevoflurane, irreversible damage is caused to brain nerves of the patient is avoided.

The application belongs to the technical field of medicine synthesis, and provides a new preparation method of isoflurane. The method uses hypochlorite and a strong acid as a chlorinating reagent to perform chlorination, which avoids the problems of low conversion rate and excessive chlorination to generate more impurities caused by chlorine gas chlorination. The reaction is more moderate, economical, environment-friendly and high-yield, and is suitable for industrial production.

The invention discloses a recovery method of sevoflurane water-alcohol mother liquor, and belongs to the technical field of medicines. The method comprises the following steps: adding perlite into sevoflurane water-alcohol mother liquor, removing fluorine ions to obtain a fluoride-free water-alcohol solution, carrying out reduced pressure distillation on the solution to remove water, adding an inert organic solvent, recovering solid which is high-purity metal chloride, carrying out reduced pressure recovery on liquid which is the organic solvent, and recovering the residual solvent which is a high-boiling-point alcohol solvent; the sevoflurane water-alcohol mother liquor is a water phase obtained by adding water into a reaction solution of chloromethyl ether and alkali metal fluoride in a high-boiling-point alcohol solvent and carrying out phase splitting. Particularly, a reaction product metal chloride and high-boiling-point alcohol in the reaction are recycled. The benefit maximization of the sevoflurane process is realized, the three wastes are reasonably treated, and the comprehensive utilization of resources is realized.

The present disclosure relates to methods and compositions comprising cannabidiol (CBD) and a volatile anaesthetic, particularly isoflurane, useful for treating or preventing traumatic brain injury (TBI).

The application provides a preparation method of improved heptafluoroethane, which comprises the following steps: reacting hexafluoroisopropanol with bromochloromethane substituted with different halogen atoms under alkaline conditions to obtain an intermediate chloromethyl-2, 2, 2-trifluoro-1-(trifluoromethyl) ethyl ether, and then fluorinating the intermediate chloromethyl-2, 2, 2-trifluoro-1-(trifluoromethyl) ethyl ether by using a fluorinating agent to obtain heptafluoroethane. The method not only solves the technical defect that hydrogen fluoride or strong acid needs to be used in the heptafluoroethane production process in the prior art, which is not conducive to large-scale production, but also can avoid the generation of by-reaction impurities, obtain heptafluoroethane with high yield and high purity, avoid material waste, and improve the raw material utilization rate. The method has the advantages of easy raw material acquisition, low cost, mild reaction condition, convenient operation, high safety, and suitability for industrial application.

The invention relates to preparation and application of a novel trifluoroalkyl sulfur-containing phenyl heterocyclic ring derivative. Specifically, the invention relates to a compound as shown in formula (I) containing a trifluoroalkyl thiophenyl heterocyclic derivative, an isotope labeled compound of the compound, an optical isomer, a geometric isomer, a tautomer or an isomer mixture of the compound, or a pharmaceutically acceptable salt of the compound, and application of the compound in preparation of insecticides for pest control. The compound can achieve a better pest control effect at a lower dosage, especially for pests and pest mites such as tetranychus cinnabarinus, tetranychus urticae and panonychus citri.